Categories: Human Body Maps

Lens Anatomy, Definition & Function


The lens is located in the eye. By changing its shape, the lens changes the focal distance of the eye. In other words, it focuses the light rays that pass through it (and onto the retina) in order to create clear images of objects that are positioned at various distances. It also works together with the cornea to refract, or bend, light.

The lens is of ellipsoid, biconvex shape. An ellipsoid is similar to a sphere but stretched out, like an olive, and biconvex means it’s rounded outward on both sides. The lens is about 10 mm across and 4 mm from front to back in adults, although its shape and size varies as it changes its focus.

The lens consists of the lens capsule, the lens epithelium, and the lens fibers. The lens capsule is the smooth, transparent outermost layer of the lens, while the lens fibers are long, thin, transparent cells that form the bulk of the lens. The lens epithelium lies between these two and is responsible for the stable functioning of the lens. It also creates lens fibers for the lifelong growth of the lens.

Common diseases of the lens include cataracts, which cause opacity, or cloudiness, in the lens. Other common ailments are presbyopia, ectopia lentis, aphakia, and nuclear sclerosis.



Source link

Share
Published by
Benefits Of

Recent Posts

Is Garlic a Vegetable?

Due to its potent flavor and variety of health benefits, garlic has been used by various cultures for thousands of…

2 hours ago

Anatomi Arteri Genicular Inferior, Fungsi & Diagram

Itu arteri genikus inferior lateral terletak di kaki bagian bawah dekat lutut dan bercabang dari arteri poplitea. Arteri ini memasok…

4 hours ago

Dorsal Cuneonavicular Ligament Anatomy, Function & Diagram

Ligaments are fibrous tissue that connect one bone to another. The dorsal cuneonavicular ligament forms the joint between the navicular…

6 hours ago

5 Health and Nutrition Benefits of Coconut

Coconut is the fruit of the coconut palm (Cocos nucifera).It’s used for its water, milk, oil, and tasty meat.Coconuts have…

8 hours ago

Benefits and Downsides of the TB12 Method

The Tom Brady Diet, also known as the TB12 Method, is a whole-foods-based diet developed by professional American football player…

14 hours ago

Anatomi, Fungsi & Diagram Ligamen Intercuneiform

Itu ligamentum interuneiformis dorsal mengamankan tiga tulang runcing. Dorsal berarti bagian atas kaki. Tulang runcing cocok di antara navicular tarsal…

15 hours ago